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In a competitive exam, 3 marks are to b...

In a competitive exam, 3 marks are to be awarded for every correct answer and for every wrong answer, 1 mark will be deducted. Madhu scored 40 marks in this exam. Had 4 marks been awarded for each correct answer and 2 marks deducted for each incorrect answer, Madhu would have scored 50 marks. How many questions were three in the test?

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VGS PUBLICATION-BRILLIANT-PAIR OF LINEAR EQUATIONS IN TWO VARIABLES-EXERCISE
  1. Solve the following pair of linear equations using elimination method....

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  2. Rubina went to a bank to withdraw Rs. 2000. She asked the cashier to ...

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  3. In a competitive exam, 3 marks are to be awarded for every correct an...

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  4. Mary told her daughter, "Seven years ago, I was seven times as old as ...

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  5. A publisher is planning to produce a new textbook. The fixed costs are...

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  6. Solve each pair of equation by using the substitution method. 3x-5y=-1...

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  7. Solve each pair of equation by using the substitution method. x+2y=-1 ...

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  8. Solve each pair of equation by using the substitution method. 2x+3y=9 ...

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  9. Solve each pair of equation by using the substitution method. x+(6)/(y...

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  10. Solve each pair of equation by using the substitution method. 0.2x+0.3...

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  11. Solve each pair of equation by using the substitution method. sqrt(2)x...

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  12. Solve each of the following pairs of equations by the elimination meth...

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  13. Solve each of the following pairs of equations by the elimination meth...

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  14. Solve each of the following pairs of equations by the elimination meth...

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  15. In a competitive exam, 3 marks are to be awarded for every correct an...

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  16. Mary told her daughter, "Seven years ago, I was seven times as old as ...

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  17. Solve the given pair of linear equations. (a-b)x+(a+b)y=a^2-2ab-b^2" a...

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  18. The ratio of incomes of two persons is 9:7 and the ratio of their expe...

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  19. The sum of two digit number and the number obtained by reversing the d...

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  20. The larger of two supplementary angles excceds the smaller by 18^(@). ...

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